Oceania
- American Samoa (unorganized, unincorporated territory of the United States)
- Governor -
- Frank Mockler, Acting Governor of American Samoa (1974–1975)
- Earl B. Ruth, Governor of American Samoa (1975–1976)
- Governor -
- Australia
- Monarch - Elizabeth II, Queen of Australia (1952–present)
- Governor-General - Sir John Kerr, Governor-General of Australia (1974–1977)
- Prime Minister -
- Gough Whitlam, Prime Minister of Australia (1972–1975)
- Malcolm Fraser, Prime Minister of Australia (1975–1983)
- Christmas Island (external territory of Australia)
- Administrator -
- C.H. Webb, Administrator of Christmas Island (1974–1975)
- William Worth, Administrator of Christmas Island (1975–1977)
- Administrator -
- Cocos (Keeling) Islands (external territory of Australia)
- Governor - John Cecil Clunies-Ross, Governor of the Cocos (Keeling) Islands (1947–1978)
- Administrator -
- C. McManus, Official representative of Cocos (Keeling) Islands (1972–1975)
- Robert James Linford, Administrator of Cocos (Keeling) Islands (1975–1977)
- Norfolk Island (self-governing territory of Australia)
- Administrator -
- Edward Thomas Pickerd, Administrator of Norfolk Island (1972–1975)
- Charles Ivens Buffett, Acting Administrator of Norfolk Island (1975–1976)
- Head of Government - Richard Albert Bataille, President of the Island Council of Norfolk Island (1974–1976)
- Administrator -
- Ellice Islands (British crown colony)
- became a separate colony by seceding from Gilbert and Ellice Islands on 1 October 1975
- Commissioner - Thomas H. Laying, Commissioner of Ellice Islands (1975–1978)
- Chief Minister - Toaripi Lauti, Chief Minister of Ellice Islands (1975–1981)
- Fiji
- Monarch - Elizabeth II, Queen of Fiji (1970–1987)
- Governor-General - Ratu Sir George Cakobau, Governor-General of Fiji (1973–1983)
- Prime Minister - Ratu Sir Kamisese Mara, Prime Minister of Fiji (1967–1987)
- French Polynesia (French overseas territory)
- Governor -
- Daniel Videau, Governor of French Polynesia (1973–1975)
- Charles Schmitt, Governor of French Polynesia (1975–1977)
- Governor -
- Gilbert Islands (British protectorate)
- Ellice Islands seceded from Gilbert and Ellice Islands on 1 October 1975
- Governor - John Hilary Smith, Governor of Gilbert and Ellice Islands (1973–1978)
- Chief Minister - Naboua Ratieta, Chief Minister of Gilbert and Ellice Islands (1974–1978)
- Guam (Insular area of the United States)
- Governor -
- Carlos Camacho, Governor of Guam (1969–1975)
- Ricardo Bordallo, Governor of Guam (1975–1979)
- Governor -
- Nauru
- President - Hammer DeRoburt, President of Nauru (1968–1976)
- New Caledonia (French overseas territory)
- High Commissioner - Gabriel Ériau, Governor of New Caledonia (1974–1978)
- New Hebrides (British-French condominium)
- British Resident Commissioner -
- Roger du Boulay (1973–1975)
- John Stuart Champion (1975–1978)
- French Resident Commissioner - Robert Gauger (1974–1978)
- British Resident Commissioner -
- New Zealand
- Monarch - Elizabeth II, Queen of New Zealand (1952–present)
- Governor-General - Sir Denis Blundell, Governor-General of New Zealand (1972–1977)
- Prime Minister -
- Bill Rowling, Prime Minister of New Zealand (1974–1975)
- Robert Muldoon, Prime Minister of New Zealand (1975–1984)
- Cook Islands (Associated state of New Zealand)
- Queen's Representative - Sir Gaven Donne, Queen's Representative of the Cook Islands (1975–1984)
- Prime Minister - Albert Henry, Prime Minister of the Cook Islands (1965–1978)
- Niue (associated state of New Zealand)
- Premier - Robert Rex, Premier of Niue (1974–1992)
- Tokelau (dependent territory of New Zealand)
- Administrator -
- William Gray Thorp, Administrator of Tokelau (1973–1975)
- Frank Corner, Administrator of Tokelau (1975–1984)
- Administrator -
- Papua New Guinea
- the Territory of Papua and New Guinea gained independence on 16 September 1975
- Monarch - Elizabeth II, Queen of Papua New Guinea (1975–present)
- Governor-General -
- Thomas Kingston Critchley, High Commissioner of Papua and New Guinea (1974–1975)
- Sir John Guise, Governor-General of Papua New Guinea (1975–1977)
- Prime Minister - Michael Somare, Chief Minister of Papua and New Guinea (1972–1975), Prime Minister of Papua New Guinea (1975–1980)
- Republic of the North Solomons (unrecognized secessionist state)
- declared independence on 1 September 1975
- President - Alexis Sarei, President of North Solomons (1975–1976)
- Pitcairn Islands (British crown colony)
- Governor - Sir David Aubrey Scott, Governor of the Pitcairn Islands (1973–1975)
- Magistrate -
- Pervis Ferris Young, Magistrate of the Pitcairn Islands (1967–1975)
- Ivan Christian, Magistrate of the Pitcairn Islands (1975–1984)
- Solomon Islands (British protectorate)
- British Solomon Islands Protectorate changed name to Solomon Islands on 22 June 1975
- Governor - Donald Luddington, Governor of the Solomon Islands (1973–1976)
- Chief Minister - Solomon Mamaloni, Chief Minister of the Solomon Islands (1974–1976)
- Tonga
- Monarch - Tāufaʻāhau Tupou IV, King of Tonga (1965–2006)
- Prime Minister - Prince Fatafehi Tu'ipelehake, Prime Minister of Tonga (1965–1991)
- Trust Territory of the Pacific Islands (UN Trust Territory administered by the United States)
- High Commissioner - Edward Elliott Johnston, High Commissioner of the Trust Territory of the Pacific Islands (1969–1976)
- Wallis and Futuna (French overseas territory)
- Administrator-Superior - Yves Arbellot-Repaire, Administrator Superior of Wallis and Futuna (1975–1976)
- President of the Territorial Assembly -
- Mikaele Folaumahina, President of the Territorial Assembly of Wallis and Futuna (1972–1975)
- Soane Patita Lakina, President of the Territorial Assembly of Wallis and Futuna (1975–1977)
- Western Samoa
- Head of State - Malietoa Tanumafili II, O le Ao o le Malo of Western Samoa (1962–2007)
- Prime Minister -
- Mata'afa Mulinu'u II, Prime Minister of Western Samoa (1973–1975)
- Tupua Tamasese Lealofi IV, Acting Prime Minister of Western Samoa (1975–1976)
Read more about this topic: List Of State Leaders In 1975